You might notice it in one bar, I fancy (11)
I believe the answer is:
inebriation
'you might notice' is the definition.
I can't tell whether this defines the answer.
'it in one bar i fancy' is the wordplay.
'fancy' indicates anagramming the letters.
'it'+'in'+'one'+'bar'+'i'='itinonebari'
'itinonebari' is an anagram of 'INEBRIATION'.
Can you help me to learn more?
(Other definitions for inebriation that I've seen before include "Merry state" , "Drunkenness" , "Getting drunk" , "being trashed" .)